c. s = √(r² + t²)
s = √(6² + 10²)
s = √(36 + 100)
s = √136 = 2√34
Lp = πr(r + s)
Lp = 3,14 x 6(6 + 2√34)
Lp = 18,84(17,66)
Lp = 332,75 cm²
Baca Juga: Kunci Jawaban Matematika Kelas 9 Halaman 266, Membahas Materi Kekongruenan dan Kesebangunan
V = ⅓ πr²t
V = ⅓ x 3,14 x 6² x 10
V = 376,8 cm³
d. t = √(s² - r²)
t = √(25² - 7²)
t = √(625 - 49)
t = √576 = 24
Lp = πr(r + s)
Lp = 22/7 x 7(7 + 25)
Lp = 22(32)
Lp = 704 cm²
V = ⅓ πr²t
V = ⅓ x 22/7 x 7² x 24
V = 1232 cm³
e. r = √(s² - t²)
r = √(4² - 3²)
r = √(16 - 9)
r = √7
Lp = πr(r + s)
Lp = 3,14 x √7(√7 + 4)
Lp = 8,31(6,65)
Lp = 55,23 cm²